🧮 Free tool
Dog Age Calculator
The old "multiply by 7" rule isn't accurate — dogs mature fast early on, and bigger dogs age more quickly. Enter your dog's age and size for a better estimate of their age in human years.
In human years, your dog is about
— years
Tip: life stage affects diet, exercise and health checks. Browse our vet guides for your dog →
An estimate only. Based on the widely used model where the first year ≈ 15 human years, the second year adds ≈ 9, and each later year adds 4–7 depending on size (bigger dogs age faster). Individual dogs vary — your vet can assess your dog's true life stage.
